public class test4 {
    //力扣  162.寻找峰值
    public int findPeakElement(int[] nums) {
        int left = 0 , right = nums.length-1,mid = 0;
        while(left < right){
            mid = left + (right - left)/2;
            if(nums[mid]>nums[mid+1]){
                right = mid;
            }else{
                left = mid+1;
            }
        }
        return left;
    }
}
